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Galaxy S4: 1080x1920

How to download the image

Tap and hold the image until a menu appears. Check the box next to the attachment(s) you wish to save, then tap "Save". The photo is now saved to a folder called Download and is viewable from the Gallery app.

How to change the background on a Galaxy S4

Press and hold your finger on a clear area of the home screen for a moment.

Once you've picked the image from the gallery, set the appropriate cropping by tapping and dragging the boxes. The outlines show how much of the image will be visible when the phone is held upright or sideways.